SISTEM is supporting PreK students’ integrated science, language, and literacy learning by creating a coherent model of family-school-community partnership with a focus on multilingual learner’s (MLs). EDC and the Connecticut Science Center (CSC) are collaborating to engage children, families, teachers, and the community to form powerful partnerships that fuel children’s science and language learning across multiple settings. The project aims to enrich the quality and quantity of science and language learning environments for young MLs, building their confidence in doing and learning science and introducing them to a variety of STEM career options. SISTEM contributes to children’s STEM interests, self-confidence, and foundational habits of mind by activating 4 synergistic approaches: • engaging families of MLs as their children’s STEM advocates • promoting teachers’ pedagogies in inquiry, oral language, and family engagement for MLs • forging strong relationships among families and teachers and • creating home/school/community STEM partnerships. Ultimately, SISTEM aims to support families, teachers, formal and informal science educators, and STEM workers in local communities to create and facilitate experiences for young children that spark children’s scientific thinking, interest, and confidence in doing and learning science, while promoting language learning and raising awareness of the value of creating a science learning ecosystem across home, school, and community.